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Retirement Plans - Defined Contribution Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Retirement Benefits [Abstract]
Eligible employee contribution maximum (percentage)	85.00%
Defined contribution plan, employment eligibility to receive matching contributions, minimum (in years)	6 months
Defined contribution plan, percentage of eligible employee contribution match, first tier (percentage)	100.00%
Defined contribution plan, percentage of eligible employee contributions matched fully, first tier (percentage)	3.00%
Defined contribution plan, eligible employee contribution match, second tier (percentage)	50.00%
Defined contribution plan, eligible employee contribution matched by the company, second tier (percentage)	2.00%
Defined contribution plan, cost recognized	$ 5.8	$ 6.0	$ 5.8

X

- Definition

Amount matched by the company for employer contributions to a defined contribution plan for the second tier of percentages applied to the employees additional contribution above the initial threshold level.

+ References

No definition available.

+ Details

Name:	tpx_DefinedContributionPlanEligibleEmployeeContributionMatchSecondTier
Namespace Prefix:	tpx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The percentage of the employees contribution to a defined contribution above the initial matching threshold that the employer will match,, as per terms of the plan.

+ References

No definition available.

+ Details

Name:	tpx_DefinedContributionPlanEligibleEmployeeContributionMatchedByCompanySecondTier
Namespace Prefix:	tpx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

For a defined contribution plan, the duration of employment for employees to be eligible to receive matching contributions.

+ References

No definition available.

+ Details

Name:	tpx_DefinedContributionPlanEmploymenteligibilitytoreceivematchingcontributionsminimum
Namespace Prefix:	tpx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

For a defined contribution plan, eligible employee contributions for a first stated percentage amount, the percentage amount matched by the company for employer contribution as stated in the plan.

+ References

No definition available.

+ Details

Name:	tpx_DefinedContributionPlanPercentageOfEligibleEmployeeContributionMatchFirstTier
Namespace Prefix:	tpx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The percentage of the employees first contributions to a defined contribution plan that the employer will match dollar for dollar.

+ References

No definition available.

+ Details

Name:	tpx_DefinedContributionPlanPercentageOfEligibleEmployeeContributionsMatchedFullyFirstTier
Namespace Prefix:	tpx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

For a defined contribution plan, the maximum amount an eligible employee pay that may be contributed to the plan, stated as a percentage total pay within a period.

+ References

No definition available.

+ Details

Name:	tpx_EligibleEmployeeContributionMaximum
Namespace Prefix:	tpx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of cost for defined contribution plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

+ Details

Name:	us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration